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ROTSE-III Discovery of a Supernova Candidate

ATel #2481; Zheng and F. Yuan, University of Michigan; J. Vinko, University of Szeged; R. Quimby, California Institute of Technology; D. Chamarro, M. D. Sisson, N. Whallon, C. Akerlof, and S. B. Pandey, University of Michigan ; J. C. Wheeler and E. Chatzopoulos, University of Texas, on behalf of the ROTSE collaboration
on 16 Mar 2010; 17:21 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Weikang Zheng (zwk@umich.edu)

Subjects: Optical, Nova, Supernovae, Transient

Referred to by ATel #: 2489

We report the discovery of a SN candidate, ROTSE3 J114340.5+485056, in unfiltered CCD images taken on March 04.19 UT at about 18.7 mag with the 0.45-m ROTSE-IIIb telescope at McDonald Observatory. The transient was detected again on March 06.21 (at mag about 18.5) and March 08.20 (mag about 18.2). The new object is located at RA = 11h43m40s.45, Dec = +48o50'56".4, which is 1.5" east and 0.4" north to the center of a faint galaxy SDSS J114340.29+485056.0 (r=21.64). Additional observations from ROTSE-IIIb show the transient remained at about 18.2 mag through March 15.20 UT. No source was detected at this location in the ROTSE-IIIb data (limit ~19.5 mag) before March 04.19 UT. A finding chart of the transient is posted at the following website URL: http://www.rotse.net/rsvp/j114340.5+485056/j114340.5+485056.jpg